Debt and Interest Costs - Long term debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Long-term debt
Finance lease obligations	$ 14	$ 12
Other (including debt issuance costs)	(56)	(60)
Long-term debt, Total	7,725	7,786
Less: Current portion of long-term debt	(3)	(3)
Long-term debt excluding current maturities	$ 7,722	7,783
5.00% Senior Notes, due March 2022
Long-term debt
Long-term Debt, Gross		$ 748
Interest rate (as a percent)	5.00%	5.00%
4.00% Senior Notes, due November 2023
Long-term debt
Long-term Debt, Gross	$ 1,000	$ 1,000
Interest rate (as a percent)	4.00%	4.00%
Senior Notes 4.375 percent, euro denominated, due December 2023
Long-term debt
Long-term Debt, Gross	$ 796	$ 855
Interest rate (as a percent)	4.375%	4.375%
Senior Notes 0.875 Percent, euro denominated, due March 2024
Long-term debt
Long-term Debt, Gross	$ 853	$ 916
Interest rate (as a percent)	0.875%	0.875%
Senior Notes 5.25 percent, due July 2025
Long-term debt
Long-term Debt, Gross	$ 1,000	$ 1,000
Interest rate (as a percent)	5.25%	5.25%
Senior Notes 4.875 Percent, due March 2026
Long-term debt
Long-term Debt, Gross	$ 750	$ 750
Interest rate (as a percent)	4.875%	4.875%
Senior Notes 1.50 Percent, euro denominated, due March 2027
Long-term debt
Long-term Debt, Gross	$ 625	$ 672
Interest rate (as a percent)	1.50%	1.50%
Senior Notes 2.875 Percent Due August 2030 [Member]
Long-term debt
Long-term Debt, Gross	$ 1,300	$ 1,300
Interest rate (as a percent)	2.875%	2.875%
Term A loan, due June 2024
Long-term debt
Long-term Debt, Gross	$ 593	$ 593
Variable interest rate (as a percent)	1.35%	1.40%
Senior Notes 3.125 percent, due September 2031 [Member]
Long-term debt
Long-term Debt, Gross	$ 850
Interest rate (as a percent)	3.125%	3.125%