Debt - Components (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Arrangements
Long-term debt	$ 2,129	$ 1,748
Short-term borrowings	72	58
Total short-term borrowings	72	438
Total debt	$ 2,201	$ 2,186
2.9% senior notes due June 1, 2030
Financing Arrangements
Debt, interest rate (as a percent)	2.90%	2.90%
Long-term debt	$ 594	$ 594
3.2% senior notes due October 1, 2026
Financing Arrangements
Debt, interest rate (as a percent)	3.20%	3.20%
Long-term debt	$ 497	$ 497
3.9% senior notes due June 1, 2050
Financing Arrangements
Debt, interest rate (as a percent)	3.90%	3.90%
Long-term debt	$ 390	$ 390
6.625% senior notes due April 15, 2037
Financing Arrangements
Debt, interest rate (as a percent)	6.625%	6.625%
Long-term debt	$ 253	$ 253
Amended term loan credit agreement due March 15, 2022
Financing Arrangements
Long-term debt, current	$ 380
Applicable interest rate (as a percent)	0.75%
Other long-term borrowings
Financing Arrangements
Long-term debt	$ 15	14
Term loan credit agreement due April 12, 2021
Financing Arrangements
Long-term debt, current		$ 380
Applicable interest rate (as a percent)		0.80%
New Revolving Credit Agreement
Financing Arrangements
Debt instrument term	5 years
Aggregate principle amount	$ 1,000
Maximum leverage ratio	3.5
Minimum ratio of consolidated EBIDTA to consolidated net interest expense	3.5
New Revolving Credit Agreement | London Interbank Offered Rate (LIBOR) [Member]
Financing Arrangements
Basis spread	1.00%