Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Long-term Commitments

The following is a schedule of future payments under PPAs, minimum lease payments with non-cancelable lease terms in excess of one year, and other net purchase obligations/commitments at March 31, 2019:

									Long-term				Demand
	Purchased				Capital		Fuel and		Service		Operating		Side
(millions)	Power		Transportation		Projects		Gas Supply		Agreements		Leases		Management		Total
2019	$	33	$	145	$	238	$	193	$	5	$	2	$	3	$	619
2020		0		175		85		32		6		2		1		301
2021		0		141		35		3		7		2		0		188
2022		0		133		7		3		7		2		0		152
2023		0		109		2		1		11		2		0		125
Thereafter		0		1,014		6		0		78		37		0		1,135
Total future minimum payments	$	33	$	1,717	$	373	$	232	$	114	$	47	$	4	$	2,520