Goodwill And Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule Of Other Intangible Assets

	March 31, 2017			December 31, 2016
	(Millions)
Customer relationships	$	1,796		$	1,796
Accumulated amortization		(201	)		(172	)
Net intangibles	$	1,595		$	1,624