Called-up share capital (Tables)

12 Months Ended

Dec. 31, 2019

Share Capital, Reserves And Other Equity Interest [Abstract]

Disclosure of classes of share capital

The allotted, called up and fully paid share capital at 31 December was as follows:

			2019				2018				2017
Issued	Shares thousand		$ million		Shares thousand		$ million		Shares thousand		$ million
8% cumulative first preference shares of £1 eacha	7,233		12		7,233		12		7,233		12
9% cumulative second preference shares of £1 eacha	5,473		9		5,473		9		5,473		9
			21				21				21
Ordinary shares of 25 cents each
At 1 January	21,525,464		5,381		21,288,193		5,322		21,049,696		5,263
Issue of new shares for the scrip dividend programme	208,927		52		195,305		49		289,789		72
Issue of new shares for employee share-based payment plans	37,400		9		92,168		23		—		—
Issue of new shares – other	—		—		—		—		—		—
Repurchase of ordinary share capital	(235,951	)	(59	)	(50,202	)	(13	)	(51,292	)	(13	)
At 31 December	21,535,840		5,383		21,525,464		5,381		21,288,193		5,322
			5,404				5,402				5,343

^a The nominal amount of 8% cumulative first preference shares and 9% cumulative second preference shares that can be in issue at any time shall not exceed £10,000,000 for each class of preference shares.

Treasury shares^a 

			2019				2018				2017
	Shares thousand		Nominal value $ million		Shares thousand		Nominal value $ million		Shares thousand		Nominal value $ million
At 1 January	1,426,265		356		1,482,072		370		1,614,657		403
Purchases for settlement of employee share plans	1,118		—		757		—		4,423		1
Issue of new shares for employee share-based payment plans	37,400		9		92,168		23		—		—
Shares re-issued for employee share-based payment plans	(167,927	)	(42	)	(148,732	)	(37	)	(137,008	)	(34	)
At 31 December	1,296,856		323		1,426,265		356		1,482,072		370
Of which – shares held in treasury by BP	1,163,077		290		1,264,732		316		1,472,343		368
– shares held in ESOP trusts	133,707		33		161,518		40		9,705		2
– shares held by BP’s US share plan administratorb	72		—		15		—		24		—

^a  See Note 32 for definition of treasury shares.

^b  Held in the form of ADSs to meet the requirements of employee share-based payment plans in the US.