Tax Matters (Tax Contingencies) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Income Tax Contingency [Line Items]
Net liabilities associated with uncertain tax positions		$ 188		$ 187		$ 180
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, January 1		(188)	[1]	(182)	[1]	(185)
Decreases based on tax positions taken during a prior period	[2],[3]	7		6		12
Increases based on tax positions taken during the current period	[2]	(9)		(9)		(8)
Lapse in statute of limitations		2		3		2
Balance, December 31	[1]	(189)		(188)		(182)
Net interest expense		1		2		2
Gross accrued interest		12		11		9
Gross accrued penalties		3		3		3
Other non-current assets
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, January 1		(3)		(3)
Balance, December 31		(3)		(3)		(3)
Noncurrent Deferred Tax Assets
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, January 1		(1)		(2)
Balance, December 31		(1)		(1)		(2)
Other Taxes Payable
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, January 1		(187)		(180)
Increases based on tax positions taken during a prior period	[2],[4]	(1)		(6)		(3)
Balance, December 31		$ (188)		$ (187)		$ (180)

[1] In 2021, included in Noncurrent deferred tax assets and Other noncurrent assets ($1 million) and Other taxes payable ($188 million). In 2020, included in Noncurrent deferred tax assets and Other noncurrent assets ($1 million) and Other taxes payable ($187 million). In 2019, included in Noncurrent deferred tax assets and Other noncurrent assets ($2 million) and Other taxes payable ($180 million).

[2] Primarily included in Provision for taxes on income.

[3] In 2021 and 2020, the decreases are primarily related to effective settlement of certain issues with tax authorities. In 2019, the decreases are primarily related to movements on prior year positions and effective settlement of certain issues with tax authorities, including movements in foreign translation adjustments on prior year positions.

[4] In 2021, 2020 and 2019, the increases are primarily related to movements on prior year positions.