Debt and Interest Costs - Activity (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Committed multi-currency revolving credit facilities due 2021
Revolving credit facility
Maximum borrowing capacity of revolving credit facility	$ 1,750
Available borrowing capacity under line of credit facility	1,700
Short-term uncommitted credit facilities
Revolving credit facility
Available borrowing capacity under line of credit facility	1,000
Amount of credit facility outstanding and due on demand	$ 12	$ 14
Weighted average interest rate of the outstanding short-term facilities (as a percent)	4.92%	5.45%
5.00% Senior Notes, due March 2022
Long-term debt
Interest rate (as a percent)	5.00%	5.00%
Revolving credit facility
Repayment of debt	$ 748
Senior Notes 3.125 percent, due September 2031 [Member]
Long-term debt
Face amount of debt	$ 850
Interest rate (as a percent)	3.125%	3.125%

Face (par) amount of debt instrument at time of issuance.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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