Discontinued Operations Income Statement (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Expenses
Net income (loss) from discontinued operations	$ (1)	$ (2)	$ (1)	$ 5
Tempo Business \| Discontinued Operations, Disposed of by Sale
Expenses
Total operating expenses	1	4	2	7
Loss from discontinued operations before income taxes	(1)	(4)	(2)	(7)
Income tax benefit	0	(2)	(1)	(3)
Net loss from discontinued operations excluding gain	(1)	(2)	(1)	(4)
Gain on sale of discontinued operations, net of tax	0	0	0	9
Net income (loss) from discontinued operations	$ (1)	$ (2)	$ (1)	$ 5

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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