Fair Value Measurements Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale debt instruments	$ 497	$ 464
Derivatives, Assets	219	98
Derivatives, Liabilities	(60)	(50)
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	978	1,370
Commercial Paper, at Carrying Value	233	225
Available for sale debt instruments	254	262
Available for Sale Securities, Government Agencies	10	1
Investments, Fair Value Disclosure	20	20
Derivatives, Assets	219	98
Total assets	1,714	1,976
Derivatives, Liabilities	(60)	(50)
Total liabilities	(60)	(50)
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	978	1,370
Investments, Fair Value Disclosure	19	20
Total assets	997	1,390
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Paper, at Carrying Value	233	225
Available for sale debt instruments	254	262
Available for Sale Securities, Government Agencies	10	1
Investments, Fair Value Disclosure	1
Derivatives, Assets	219	98
Total assets	717	586
Derivatives, Liabilities	(60)	(50)
Total liabilities	$ (60)	$ (50)