Leases (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure of leases [Abstract]

Disclosure of maturity analysis of operating lease payments

The table below shows the timing of the undiscounted cash outflows for the lease liabilities included on the balance sheet.

			$ million
	2019		2018a
Undiscounted lease liability cash flows due:
Within 1 year	2,514		98
1 to 2 years	1,839		97
2 to 3 years	1,364		95
3 to 4 years	1,105		94
4 to 5 years	876		86
5 to 10 years	2,427		309
Over 10 years	1,174		571
	11,299		1,350
Impact of discounting	(1,577	)	(683	)
Lease liabilities at 31 December	9,722		667
Of which – current	2,067		44
– non-current	7,655		623

^a Comparative information represents finance leases accounted for under IAS 17

Disclosure of quantitative information about right-of-use assets [text block]

	$ million
	2019
Total cash outflow for amounts included in lease liabilitiesa	2,709
Expense for variable payments not included in the lease liability	67
Short-term lease expense	331
Additions to right-of-use assets in the period	2,542

^a The cash outflows for amounts not included in lease liabilities approximate the income statement expense disclosed above