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Employment costs

12 Months Ended

Dec. 31, 2017

Disclosure Of Employee Cost Explanatory [Abstract]

Disclosure Of Employee Cost Explanatory

5 Employment costs

			2017			2016			2015
	Note	US$m			US$m			US$m
Total employment costs
– Wages and salaries			4,129			4,235			4,670
– Social security costs			337			429			430
– Net post-retirement charge	44		500			522			439
– Share option charge	43		91			116			128
			5,057			5,302			5,667
Less: charged within provisions ^(a)	26		(292	)		(421	)		(221	)
Employment costs	4		4,765			4,881			5,446

(a)	Amounts included above in respect of provisions for pensions, post-retirement healthcare, long service leave and other employee entitlements which are included in ‘Provisions (including exchange differences on provisions)’ in note 4.