Income Taxes - Schedule of Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Other amortizable assets	$ 385	$ 394
Tax credit carryforwards	564	387
Lease obligations	243	254
Deferred compensation	110	120
Restructuring charges and other reserves	129	104
NOL and other carryforwards	101	73
Pension plan	56	66
Foreign currency translation	3	57
Total deferred tax assets	1,591	1,455
Valuation allowance for deferred tax assets	(295)	(330)
Deferred tax assets, net of valuation allowance	1,296	1,125
Deferred tax liabilities:
Fixed and intangible assets	765	763
Investment basis differences	269	258
Right-of-use Assets	187	223
Unrealized gains on investment securities, net	321	86
Other	51	32
Total deferred tax liabilities	$ 1,593	$ 1,362