Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2019:

									Long-term				Demand
	Purchased				Capital		Fuel and		Service		Operating		Side
(millions)	Power		Transportation		Projects		Gas Supply		Agreements		Leases		Management		Total
2019	$	23	$	100	$	246	$	125	$	3	$	1	$	2	$	500
2020		0		196		86		33		6		2		1		324
2021		0		191		35		3		7		2		0		238
2022		0		184		9		3		7		2		0		205
2023		0		161		3		1		11		2		0		178
Thereafter		0		1,647		13		0		78		35		0		1,773
Total future minimum payments	$	23	$	2,479	$	392	$	165	$	112	$	44	$	3	$	3,218