Guarantees	6 Months Ended
Jun. 30, 2018
Guarantees [Abstract]
Guarantees	11. Guarantees As of June 30, 2018, the maximum potential undiscounted future payments and related liability resulting from guarantees and indemnifications provided by us in the ordinary course of business were $1 billion and $42 million, respectively, and related primarily to our real estate and business dispositions. As of December 31, 2017, the maximum potential undiscounted future payments and related liability were $1 billion and $52 million, respectively. To date we have not experienced any significant losses related to guarantees or indemnifications. Our recognition of these instruments is at fair value. In addition, we establish reserves when a loss is probable and the amount can be reasonably estimated.

Guarantees

6 Months Ended

Jun. 30, 2018

11. Guarantees

As of June 30, 2018, the maximum potential undiscounted future payments and related liability resulting from guarantees and indemnifications provided by us in the ordinary course of business were $1 billion and $42 million, respectively, and related primarily to our real estate and business dispositions. As of December 31, 2017, the maximum potential undiscounted future payments and related liability were $1 billion and $52 million, respectively.

To date we have not experienced any significant losses related to guarantees or indemnifications. Our recognition of these instruments is at fair value. In addition, we establish reserves when a loss is probable and the amount can be reasonably estimated.