Compensation and Benefit Plans (Stock Option Activity) (Details) - Stock options $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Stock Options
Beginning balance (in shares) | shares	10,709,383
Grants (in shares) | shares	2,515,015
Forfeited or expired (in shares) | shares	(330,916)
Exercised (in shares) | shares	(538,656)
Ending balance (in shares) | shares	12,354,826
Vested and expected to vest (in shares) | shares	11,974,609
Exercisable (in shares) | shares	7,412,820
Exercise Price
Beginning balance, weighted average exercise price (in dollars per share) | $ / shares	$ 63.85
Granted, weighted average exercise price (in dollars per share) | $ / shares	55.04
Forfeited or expired, weighted average exercise price (in dollars per share) | $ / shares	62.49
Exercised, weighted average exercise price (in dollars per share) | $ / shares	48.02
Ending balance, weighted average exercise price (in dollars per share) | $ / shares	62.78
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares	62.83
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 64.27
Remaining Contractual Term (Years)
Outstanding at December 31, 2016 (term)	5 years 11 months 4 days
Vested and expected to vest at December 31, 2016 (term)	5 years 10 months 6 days
Exercisable at December 31, 2016 (term)	4 years 5 months 4 days
Aggregate Intrinsic Value (in millions)
Vested and expected to vest at December 31, 2019 | $	$ 80
Exercisable at December 31, 2019 | $	43
Exercise of option, tax benefit | $	$ 2
SCE
Stock Options
Beginning balance (in shares) | shares	5,490,488
Grants (in shares) | shares	1,404,603
Forfeited or expired (in shares) | shares	(307,607)
Exercised (in shares) | shares	(407,330)
Ending balance (in shares) | shares	6,180,154
Vested and expected to vest (in shares) | shares	5,997,654
Exercisable (in shares) | shares	3,666,657
Exercise Price
Beginning balance, weighted average exercise price (in dollars per share) | $ / shares	$ 62.85
Granted, weighted average exercise price (in dollars per share) | $ / shares	55.14
Forfeited or expired, weighted average exercise price (in dollars per share) | $ / shares	62.65
Exercised, weighted average exercise price (in dollars per share) | $ / shares	48.80
Ending balance, weighted average exercise price (in dollars per share) | $ / shares	62.03
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares	62.07
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 63.24
Remaining Contractual Term (Years)
Outstanding at December 31, 2016 (term)	5 years 10 months 13 days
Vested and expected to vest at December 31, 2016 (term)	5 years 9 months 18 days
Exercisable at December 31, 2016 (term)	4 years 3 months 7 days
Aggregate Intrinsic Value (in millions)
Vested and expected to vest at December 31, 2019 | $	$ 44
Exercisable at December 31, 2019 | $	25
Exercise of option, tax benefit | $	$ 2