Customer Financing (Financing Receivable Credit Quality Indicators) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 26
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	262
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	123
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	63
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	791
Carrying value of financing receivables	1,278	$ 1,356
CCC Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	22
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	404
Carrying value of financing receivables	433
B Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	35
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	187
Carrying value of financing receivables	222
BB Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	26
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	227
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	116
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	41
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	118
Carrying value of financing receivables	541
BBB Credit Rating
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	82
Carrying value of financing receivables	$ 82