Number of new stock issued during the period.

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Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Consolidated Statements of Equity (Parentheticals) - USD ($) shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2017
Progress Energy
Non-cash dividend			$ 547
Preferred Stock \| Series A Preferred Stock
Stock issuances, shares		40
Preferred Stock \| Series B Preferred Stock
Stock issuances, shares	1