24 advance billings and customer deposits


	June 30,		December 31,
As at (millions)	2019		2018
Advance billings	$	550	$	538
Deferred customer activation and connection fees		9		10
Customer deposits		13		13
Contract liabilities		572		561
Other		93		95
	$	665	$	656

Contract liabilities represent our future performance obligations to customers in respect of services and/or equipment and for which we have received consideration from the customer or for which an amount is due from the customer. Our contract liability balances, and the changes in those balances, are set out in the following table:


		Three months				Six months
Periods ended June 30 (millions)	Note	2019		2018		2019		2018
Balance, beginning of period		$	814	$	788	$	811	$	780
Revenue deferred in previous period and recognized in current period			(642)		(637)		(647)		(689)
Net additions arising from operations			638		628		641		686
Additions arising from business acquisitions	18(b)		1		1		6		3
Balance, end of period		$	811	$	780	$	811	$	780
Current						$	732	$	691
Non-current	27
Deferred revenues							65		72
Deferred customer activation and connection fees							14		17
						$	811	$	780
Reconciliation of contract liabilities presented in the consolidated statements of financial position – current
Gross contract liabilities						$	732	$	691
Reclassification to contract assets for contracts with contract liabilities less than contract assets							(155)		(142)
Reclassification from contract assets for contracts with contract assets less than contract liabilities							(5)		(5)
						$	572	$	544