Fair Value, Assets and Liabilities, Valuation Techniques - Recurring Basis (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021 USD ($) $ / loan	Dec. 31, 2020 USD ($) $ / loan
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	$ 6,862	$ 6,125
Fair value, recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for sale	17,781	18,806
Fair Value Disclosures, Textual [Abstract]
Total assets prior to derivative netting	402,417	419,955
Total liabilities prior to derivative netting	(72,651)	(80,506)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans held for sale	991	1,234
Insignificant Level 3 assets, net of liabilities	(11)	44
Assets, fair value disclosure, net of liabilities	19,364	19,930
Fair Value Disclosures, Textual [Abstract]
Total assets prior to derivative netting	21,772	21,934
Total liabilities prior to derivative netting	(2,408)	(2,004)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available-for-sale debt securities	2,038	2,126
Loans held for sale	991	1,234
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Valuation technique, vendor priced [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available-for-sale debt securities	$ 134	$ 759
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	0.004	0.004
Loans held for sale, measurement input	0.016	0.013
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	0.115	0.147
Loans held for sale, measurement input	0.126	0.120
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	0.041	0.036
Loans held for sale, measurement input	0.049	0.045
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Valuation, market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available-for-sale debt securities	$ 214	$ 173
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Minimum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	(0.377)	(0.398)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Maximum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	0.139	0.003
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Weighted average [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	(0.061)	(0.084)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, default rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.000	0.000
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, default rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.302	0.316
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, default rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.013	0.017
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, loss severity [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.000	0.000
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, loss severity [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.468	0.323
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, loss severity [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.156	0.184
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.073	0.083
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.194	0.236
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Loans held for sale, measurement input	0.135	0.151
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, multiples [Member] | Valuation, market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available-for-sale debt securities	$ 131	$ 109
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, multiples [Member] | Minimum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	0.4	7.2
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, multiples [Member] | Maximum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	12.1	12.1
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Measurement input, multiples [Member] | Weighted average [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Trading and available-for-sale debt securities, measurement input	6.5	8.0
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and (liabilities)	$ 113	$ 206
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, default rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.000	0.000
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, default rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.050	0.060
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, default rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.019	0.017
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, loss severity [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.500	0.500
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, loss severity [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.500	0.500
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, loss severity [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.500	0.500
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, prepayment rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.028	0.028
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, prepayment rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.220	0.220
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Interest rate contracts [Member] | Measurement input, prepayment rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.186	0.182
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and (liabilities)	$ 51	$ 240
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, fall-out factor [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.010	0.010
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, fall-out factor [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.990	0.990
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, fall-out factor [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.166	0.288
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, initial-value servicing [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	(0.0063)	(0.00516)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, initial-value servicing [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.01510	0.02680
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Derivative loan commitments [Member] | Measurement input, initial-value servicing [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.00727	0.00655
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and (liabilities)	$ 244	$ 220
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Valuation technique, option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and (liabilities)	$ (579)	$ (534)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, weighted average life [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), term of contract	3 months 18 days	6 months
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, weighted average life [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), term of contract	2 years 3 months 18 days	2 years
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, weighted average life [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), term of contract	1 year 3 months 18 days	1 year
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, conversion factor [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	(0.098)	(0.086)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, conversion factor [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.000	0.000
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, conversion factor [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	(0.094)	(0.082)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, correlation factor [Member] | Minimum [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	(0.770)	(0.770)
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, correlation factor [Member] | Maximum [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.990	0.990
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, correlation factor [Member] | Weighted average [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.211	0.248
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, volatility factor [Member] | Minimum [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.065	0.065
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, volatility factor [Member] | Maximum [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.788	0.966
Fair value, recurring [Member] | Fair value, inputs, level 3 [Member] | Equity contracts [Member] | Measurement input, volatility factor [Member] | Weighted average [Member] | Valuation technique, option model [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Net derivative assets and (liabilities), measurement input	0.162	0.264
Fair value, recurring [Member] | Non modified loans [Member] | Fair value, inputs, level 3 [Member] | Measurement input, cost to service per loan [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input | $ / loan	56	63
Fair value, recurring [Member] | Non modified loans [Member] | Fair value, inputs, level 3 [Member] | Measurement input, cost to service per loan [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input | $ / loan	234	252
Fair value, recurring [Member] | Residential mortgage [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	$ 6,862	$ 6,125
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	6,862	6,125
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	$ 6,862	$ 6,125
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.056	0.049
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.089	0.083
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, discount rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.063	0.058
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, cost to service per loan [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input | $ / loan	56	63
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, cost to service per loan [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input | $ / loan	611	712
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, cost to service per loan [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input | $ / loan	108	130
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.131	0.143
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.209	0.228
Fair value, recurring [Member] | Residential mortgage [Member] | Fair value, inputs, level 3 [Member] | Measurement input, prepayment rate [Member] | Weighted average [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage servicing rights, measurement input	0.154	0.199
Fair value, recurring [Member] | Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities	$ 9,237	$ 9,259
Fair value, recurring [Member] | Nonmarketable equity securities [Member] | Fair value, inputs, level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities	9,176	9,228
Fair value, recurring [Member] | Nonmarketable equity securities [Member] | Fair value, inputs, level 3 [Member] | Valuation, market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities	$ 9,176	$ 9,228
Fair value, recurring [Member] | Nonmarketable equity securities [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Minimum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input	(0.191)	(0.203)
Fair value, recurring [Member] | Nonmarketable equity securities [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Maximum [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input	(0.052)	(0.032)
Fair value, recurring [Member] | Nonmarketable equity securities [Member] | Fair value, inputs, level 3 [Member] | Measurement input, market comparability adjustment [Member] | Weighted average [Member] | Valuation, market comparable pricing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input	(0.159)	(0.138)