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Contractual interest rate for funds borrowed, under the debt agreement.

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Short-Term Borrowings, Long-Term Debt and Available Credit Facilities Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	May 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Debt Instrument [Line Items]
Finance Lease, Liability, Noncurrent	$ 4		$ 5	$ 6
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	11		0	0
Long-term Debt Payable within one year	1		1	4
Long-term Debt and Lease Obligation	1,102		115	116
Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 500
Debt Instrument, Interest Rate, Stated Percentage		1.70%
Medium-term Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 109		$ 109	$ 110
Long-term Debt, Weighted Average Interest Rate, at Point in Time	0.00%		1.61%	1.88%
Senior Notes Due 2030 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 500
Debt Instrument, Interest Rate, Stated Percentage		2.30%
Notes Maturing 2025 [Domain] \| Loans Payable [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 500		$ 0	$ 0
Long-term Debt, Weighted Average Interest Rate, at Point in Time	1.70%		0.00%	0.00%
Notes Maturing 2030 [Domain] \| Loans Payable [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 500		$ 0	$ 0
Long-term Debt, Weighted Average Interest Rate, at Point in Time	2.30%		0.00%	0.00%
Foreign Currency Loans [Member] \| Loans Payable [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1		$ 2	$ 4
Fair Value, Inputs, Level 2 [Member]
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 1,164		$ 119	$ 123